Seriously, could there be any more trivial way of determining the outcome of a House race? The lady has lousy driving habits. So what? What's her legislative record? What special interests does she have a special relationship with? These are the things I'd be wondering about.

Yet TPM's assumption appears to be founded in reality. Here's a quote from a local paper:

[T]he longer the speeding issue lives in public discussion, the worse it is for Noem, said Joel Rosenthal, a former state Republican Party chairman from Sioux Falls.

It isn’t just the news stories of Noem’s driving record over the past 21 years that have kept the issue alive, Rosenthal said. It’s also the fight-back response from Noem supporters, who provided state records showing that Herseth Sandlin’s father, former state Sen. Lars Herseth, had a string of 17 speeding tickets himself.